有如下程序#include using namespace std;class A{ 发布时间:2017-07-24 21:49 │ 来源:www.tikuol.com 题型:单项选择题 问题: 有如下程序#include using namespace std;class A{ public:virtual void func1(){cout<<"A1";}void func2(){cout<<"A2";}} ;class B:public A{ public:void func1(){cout<<"B1";}void func2(){cout<<"B2";} } ;int main(){A*P=new B;p->func1(); P->func2();return 0;}运行此程序,屏幕上将显示输出【 】A.B1 B2B.A1 A2C.B1 A2D.A1 B2